/******************************************************************************

    Copyright (C) 2006 Alessio Stalla (alessiostalla@gmail.com)

    This file is part of PrettyProlog.

    PrettyProlog is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    PrettyProlog is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with PrettyProlog; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    See the file COPYING for further details.

 *****************************************************************************/

package prettyprolog.engine.listeners;

import prettyprolog.datatypes.Constraint;
import prettyprolog.datatypes.Substitution;

/**
 * An EngineEvent is generated by the Engine every time a solution is found,
 * and then dispatched to every EngineListener attached to it. EngineEvents contain
 * the Substitution associated with the solution, and may contain more useful information
 * in the future.
 */
public class EngineEvent {

    private Substitution subst;
    private Constraint cons;

    /** Constructs a new EngineEvent. */
    public EngineEvent(Substitution s, Constraint c) {
    	subst = s;
    	cons = c;
    }

    /** @return the Substitution associated with this event. */
    public Substitution getSubstitution() {
    	return subst;
    }
    
    public Constraint getConstraint() {
    	return cons;
    }
}
